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I am Experiencing Dropped Calls

1 min readLast updated: 09.02.2025

Understanding dropped calls

Dropped calls typically occur for the following reasons.

Router firewall

Firewalls are the leading cause of dropped calls. Most routers have a service called SIP ALG. This service can cause call quality issues, dropped calls, phones not to ring, and calls to drop during a transfer. Disable this setting for the best call quality. Learn more by searching “SIP ALG” on our support page.

Internet quality

Internet quality is essential to call quality. If you are experiencing garbled or dropped calls, make sure that your internet service is at least 20 Mbps download and 10 Mbps upload. You can run a speed test at Speedtest.net.

How do I get help?

For help configuring your router/firewall to best work with Mango Voice, testing your network, or troubleshooting dropped calls, contact our support team.